I've updated Simple Mail from 2.81 to 2.82 recently and have got an error when I've tried to send e-mail:
"
Timestamp: 14.05.2012 16:03:10
Error: uncaught exception: [Exception... "String contains an invalid character" code: "5" nsresult: "0x80530005 (NS_ERROR_DOM_INVALID_CHARACTER_ERR)" location: "chrome://simplemail/content/mail.js Line: 255"]
'
Receiving e-mail works fine!
And one more suggestion: could you add a selector for "Standard" status icons (envelope without stars and so on - as it has been before)?

Best regards!